The Energizer A27 12V Alkaline Battery is a ‘miniature alkaline’ cylindrical-shaped battery perfectly designed for electronic applications requiring high rate pulses such as LED lights and remote garage door controllers to name a few. Energizer A27 12V Alkaline Batteries perform better than any conventional Zinc Chloride or Zinc Carbon battery. The operating time offers 4 – 15 times more than that of other comparable batteries. The cylindrical shape strategically enhances the battery’s overall performance, life and capacity. It offers a good electrochemical efficiency and high energy capacity even during long term usage and variant temperatures (to about -30C).